What distinguishes expression vectors from other cloning vectors?
a. Expression vectors do not have an origin of replication.
b. Only expression vectors have origins of replication.
c. Expression vectors contain regulatory sequences to allow transcription and translation of an inserted gene.
d. Inserted genes cannot be transcribed from an expression vector.
e. Expression vectors do not contain antibiotic resistance genes.
ANSWER: c
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If a cell is dividing by binary fission then you know that:a
mitosis has taken place without cytokinesis. b. homologous chromosomes have already paired. c. the cyclin-Cdk complex is no longer phosphorylating enzymes. d. the cell cycle is out of control. e. the cell is prokaryotic
In order for a population to meet the conditions of the Hardy-Weinberg predictions, it must:a
have only moderate migration in and out of the population. b. have no natural selection. c. have only occasional matings determined by humans. d. have mating between relatives. e. not be very large.
Peptidoglycan is a unique macromolecule found in bacterial
A. inclusions. B. capsules. C. slime layers. D. cell walls. E. cell membranes.
Which of the following bacterial genera produce(s) endospores?
A) Bacillus B) Clostridium C) Lactobacillus D) both Bacillus and Lactobacillus E) both Bacillus and Clostridium